Synthesis, properties and thermal decomposition of the Ta4AlC3 MAX phase

Matteo Griseri, Bensu Tunca, Thomas Lapauw, Shuigen Huang, Lucia Popescu, Michel W. Barsoum, Konstantina Lambrinou, Jozef Vleugels

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

The present work describes a synthesis route for bulk Ta 4 AlC 3 MAX phase ceramics with high phase purity. Pressure-assisted densification was achieved by both hot pressing and spark plasma sintering of Ta 2 H, Al and C powder mixtures in the 1200–1650 °C range. The phases present and microstructures were characterized as a function of the sintering temperature by X-ray diffraction and scanning electron microscopy. High-purity α-Ta 4 AlC 3 was obtained by hot pressing at 1500 °C for 30 min at 30 MPa. The β-Ta 4 AlC 3 allotrope was observed in the samples produced by SPS. The Young's modulus, Vickers hardness, flexural strength and single-edge V-notch beam fracture toughness of the high-purity bulk sample were determined. The thermal decomposition of Ta 4 AlC 3 into TaC x and Al vapour in high (˜10 −5 mbar) vacuum at 1200 °C and 1250 °C was also investigated, as a possible processing route to produce porous TaC x components.

Original languageEnglish
Pages (from-to)2973-2981
Number of pages9
JournalJournal of the European Ceramic Society
Volume39
Issue number10
Early online date8 Apr 2019
DOIs
Publication statusPublished - 1 Aug 2019
Externally publishedYes

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Hot pressing
Pyrolysis
Spark plasma sintering
Vickers hardness
Densification
Bending strength
Powders
Fracture toughness
Sintering
Elastic moduli
Vapors
Vacuum
X ray diffraction
Microstructure
Scanning electron microscopy
Processing
Temperature

Cite this

Griseri, M., Tunca, B., Lapauw, T., Huang, S., Popescu, L., Barsoum, M. W., ... Vleugels, J. (2019). Synthesis, properties and thermal decomposition of the Ta4AlC3 MAX phase. Journal of the European Ceramic Society, 39(10), 2973-2981. https://doi.org/10.1016/j.jeurceramsoc.2019.04.021
Griseri, Matteo ; Tunca, Bensu ; Lapauw, Thomas ; Huang, Shuigen ; Popescu, Lucia ; Barsoum, Michel W. ; Lambrinou, Konstantina ; Vleugels, Jozef. / Synthesis, properties and thermal decomposition of the Ta4AlC3 MAX phase. In: Journal of the European Ceramic Society. 2019 ; Vol. 39, No. 10. pp. 2973-2981.
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Griseri, M, Tunca, B, Lapauw, T, Huang, S, Popescu, L, Barsoum, MW, Lambrinou, K & Vleugels, J 2019, 'Synthesis, properties and thermal decomposition of the Ta4AlC3 MAX phase', Journal of the European Ceramic Society, vol. 39, no. 10, pp. 2973-2981. https://doi.org/10.1016/j.jeurceramsoc.2019.04.021

Synthesis, properties and thermal decomposition of the Ta4AlC3 MAX phase. / Griseri, Matteo; Tunca, Bensu; Lapauw, Thomas; Huang, Shuigen; Popescu, Lucia; Barsoum, Michel W.; Lambrinou, Konstantina; Vleugels, Jozef.

In: Journal of the European Ceramic Society, Vol. 39, No. 10, 01.08.2019, p. 2973-2981.

Research output: Contribution to journalArticle

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AU - Tunca, Bensu

AU - Lapauw, Thomas

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AU - Lambrinou, Konstantina

AU - Vleugels, Jozef

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